Which of the following is biodegradable waste?
  • DDT
  • Aluminium can
  • Plastic bag
  • Cow dung
Which of the two sets belong to the same trophic level?
  • Rabbit: Tiger
  • Vulture : Rat
  • Grasshopper : Hawk
  • Frog : Lizard
In a given food chain if the amount of energy at the fourth trophic level is 6 kJ, what will be the energy available at the producer level?
  • 6000 kJ
  • 20 kJ
  • 60 kJ
  • 600 kJ
Which of the following is the best way for disposal of vegetable and fruit peels?
  • Landfill
  • Recycling
  • Composting
  • Burning
The problem caused due to ozone hole is
  • earthquakes
  • damage due to UV radiations
  • chemical pollution
  • acid rain
An ecosystem includes
  • all living organisms
  • non-living objects
  • both living organisms and non-living objects
  • sometimes living organisms and sometimes non-living objects
Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as
  • eutrophication
  • pollution
  • biomagnification
  • accumulation
In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of
  • heat energy
  • light energy
  • chemical energy
  • mechanical energy
Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called
  • decomposers
  • producers
  • herbivores
  • carnivores
Excessive exposure of humans to UV-rays results in
  • (i) and (ii)
  • (ii) and (iv)
  • (i) and (iii)
  • (iii) and (iv)
Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level constitute the
  • food web
  • ecological pyramid
  • ecosystem
  • food chain
In the given Figure the various trophic levels are shown in a pyramid. At which trophic level is maximum energy available?
MCQ Questions for Class 10 Science Chapter 15 Our Environment with Answers
  • T4
  • T2
  • T1
  • T3
Which group of organisms are not the constituents of a food chain?
  • (i) and (iii)
  • (iii) and (iv)
  • (ii) and (iii)
  • (i) and (iv)
The percentage of solar radiation absorbed by all the green plants for the process of photosynthesis is about
  • 1%
  • 5%
  • 8%
  • 10%
Which of the statements is incorrect?
  • All green plants and blue green algae are producers
  • Green plants get their food from organic compounds
  • Producers prepare their own food from inorganic compounds
  • Plants convert solar energy into chemical energy
The decomposers in an ecosystem
  • convert inorganic material, to simpler forms
  • convert organic material to inorganic forms
  • convert inorganic materials into organic compounds
  • do not breakdown organic compounds
Disposable plastic plates should not be used because
  • they are made of materials with light weight
  • they are made of toxic materials
  • they are made of biodegradable materials
  • they are made of non-biodegradable materials
What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger
  • The population of tiger increases
  • The population of grass decreases
  • Tiger will start eating grass
  • The population of tiger decreases and the population of grass increases
When is the world environment day celebrated?
  • 16 June
  • 5 December
  • 5 June
  • 5 July
Which of these is a greenhouse gas?
  • Hydrogen sulphide
  • Methane
  • Ozone
  • Carbon monoxide
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